[Feature] Project Management - Create, Save, Open, and Organize Video Projects

[vzeman]

Summary

Implement a full project management system for the AI Video Editor. This is the foundation of the application, enabling users to create, organize, and persist their video projects across sessions.

Requirements

• Multiple projects support with project list/dashboard view
• Create new project with name, description, aspect ratio, resolution preset
• Open existing projects from local filesystem
• Save project state (scenes, settings, generated assets) as .aivp project file format
• Auto-save with configurable interval (every 30s, 1min, 5min)
• Recent projects list on home screen
• Project duplication (clone project)
• Project metadata: name, created date, last modified, total duration, scene count, thumbnail
• Project settings: default resolution (9:16, 16:9, 1:1, 4:3), default FPS (24, 30, 60), default video model
• Project export summary (total cost estimate, total duration)
• Trash/archive projects without deleting
• Project search and filtering on dashboard
• Import project from .aivp file

Tech Notes

• Use path_provider for local storage
• Serialize project as JSON inside a zip archive (with assets)
• Thumbnail = first generated frame of project

Acceptance Criteria

• User can create a new project from the dashboard
• User can open an existing .aivp file
• Project auto-saves at the configured interval
• Recent projects appear on the home screen
• Project can be duplicated and deleted/archived
• Project metadata is correctly persisted and displayed

Related

Part of the ai-video-editor Flutter application in the /ai-video-editor folder.